Health Check method: set up IA

content/references/rippled-api/peer-port-methods/health-check.md

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+# Health Check
+
+The Health Check is a special [peer port method](peer-port-methods.html) for reporting on the health of an individual `rippled` server.
+
+***TODO: detailed description. PR: <https://github.com/ripple/rippled/pull/3365>***

content/references/rippled-api/peer-port-methods/peer-crawler.md

@@ -1,6 +1,6 @@
 # Peer Crawler
 
-The Peer Crawler is a special API endpoint for reporting on the health and topology of the peer-to-peer network. This API method is available by default on a non-privileged basis through the [Peer Protocol](peer-protocol.html) port, which is also used for `rippled` servers' peer-to-peer communications about consensus, ledger history, and other necessary information.
+The Peer Crawler is a special [peer port method](peer-port-methods.html) for reporting on the health and topology of the peer-to-peer network. This API method is available by default on a non-privileged basis through the [Peer Protocol](peer-protocol.html) port, which is also used for `rippled` servers' peer-to-peer communications about consensus, ledger history, and other necessary information.
 
 The information reported by the peer crawler is effectively public, and can be used to report on the overall XRP Ledger network, its health, and topology.